body {
  margin: 0;
  font: 12px/22px Arial, "微软雅黑";
  color: #333;
}
header,
footer,
section,
article,
aside,
nav,
figure {
  display: block;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
p,
dl,
dd {
  margin: 0;
}
h1,
h2,
h3,
h4 {
  margin: 0;
  font-size: 100%;
}

img {
  border: none;
}
a {
  color: #21a557;
  cursor: pointer;
  text-decoration: none;
}
a:active,
a:hover {
  outline: none;
}
a:hover {
  text-decoration: underline;
}

strong {
  font-weight: normal;
}
em,
i {
  font-style: normal;
}

table {
  border-collapse: collapse;
  table-layout: fixed;
  border-spacing: 0;
}
th,
td {
  padding: 0;
}
button,
input {
  box-sizing: border-box;
  padding: 0;
  border: none;
  background: none;
}
